<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="js/vue.js"></script>
</head>
<body>
    <div id="app">     
        <input type="text" v-model="myVal">
        <ul>
            <li v-for="item,index in updateData">{{ item }}</li>
        </ul>
    </div>
    <script>
        let app = new Vue({
            el: "#app",
            data: {
                list : ["aaa","bbb","abc","bac","bbc","cbb","ccc"],
                myVal : ""
            },
            computed: {
                updateData(){
                    return this.list.filter(item => item.includes(this.myVal))
                }
            }
        })
    </script>
</body>
</html>